Mold for forming ornamental plastic buttonhole casings



Sept. 20, 1949. 1. BOTWlNlCK MOLD FOR FORMING ORNAMENTAL PLASTIC BUTTONHOLE CASINGS 3 Sheets-Sheet 1 Filed April 50, 1947 ISRAEL BOTWINIOK lNVENTOR BY W m ATTORNEY Sept. 20, 1949. o w N cK 2,482,239

MOLD FOR FORMING ORNAMENTAL PLASTIC BUTTONHOLE CASINGS 3 Sheets-Sheet 2 Filed April 30, 1947 ISRAEL BOTWINlCK INVENTOR BYWW ATTORNEY Sept. 20, 1949- l. BOTWINICK MOLD FOR FORMING ORNAMENTAL PLASTIC BUTTONHOLE CASINGS 5 Sheets-Sheet 3 Filed April 30, 1947 ISRAEL BOTWINIGK INVENTQR BY W M ATTORNEY Patented Sept. 20, 1949 UNITED STATES PATENT oFFIcE MOLD FOR FORMING ORNAMENTAL PLASTIC BUTTONHOLE GASINGS Israel Botwinick, Brooklyn, Y.

Application April so, 1947, ScrialNo.744,871

1 Zillahns.

This invention relates to a four-section mold I for molding plastic ornamental buttonhole fi ures on fabrics. v

An object of this invention :is to provide a foursection mold, whereby plastic ornamental figures may be molded on both sides of a piece of cloth with the sprues perpendicular to the ornamental figures. I

Another object of this invention is to provide a four-section mold of the character described, whereby finished plastic ornamental figures and sprues attached thereto may be removed from the mold as a unit.

Another object of this invention is to provide a mold for forming a plurality of individually injected plastic figures on a fabric without having any ribs connecting the figures when removed from the mold. I

With the above and other objects in view, the invention will be hereinafter "more particularly described, and the combination and arrangement of parts will be shown in the accompanying draw ings and pointed out in the claims which form part of this specification.

Reference will now be had to the drawings, wherein like numerals of reference designate corresponding parts throughout the several views, in which: I I

Figure 1 is a perspective view .of the four-section mold in closed position.

Figure 2 is a perspective View of the mold in open position, and showing the lower mold cavities and gates.

Figure 3 is a perspective view of the four-section mold in operative position and showing a section of fabric extending therefrom, a portion of the fabric being inside the mold and having the ornamental buttonhole figures applied thereto.

Figure 4 is a cross-sectional view, the section being taken as on line 4-4 inFlgure 3.

I Figure 5 is a cross-sectional view of the mold in open position and showing a section of fabric having ornamental plastic figures secured thereto on opposite sides of the fabric.

Figure 6 is a fragmentary plan view of the section of fabric when removed from the mold and showing plastic ornamental figures bonded thereto and having buttonhole slits made therein in a slitting device. p In the illustrated embodiment or the mventicn, the numeral I indicates a four-section mold which is of rectangular form and comprises two upper hinged sections I I, II, and two lower hinged-sections I2, I2.

The upper mold section II is pivotally mounted on the section II by means of hinges 3. The lower mold section I2 is pivotally mounted on the section I2 by means of hinges I4.

The two lower mold sections I2, I2, comprise a two-member ornamental cavity I and complementary gateways H for feeding material to the cavity I5.

Figure 2 shows the upper and lower mold see tlons II, I2, in spaced-apart relation to permit a section of fabric 20 to be inserted therebetween- Figures 3 and 4 show the section of fabric inserted intermediate the cavities I5, I5", and in operative position whereby thermoplastic ma terial may be fed through the gateways into the cavities.

The cavityin the lower mold sections may be of a design identical to the cavity in the upper mold sections. The upper and lower mold section are held in alinement or registry so that the ornamental figures are in superposed relation.

In operation, the heated thermoplastic material is injected through the upper and lower gateways 16, I1 and fill the upper and lower cavities I5, I5, simultaneously, the pressure under which the heated material is injected causes the material to be solidly impressed into the pores or interstices in the fabric and so that upon cooling, the superposed ornamental figures remain bonded as a permanent part of the fabric and are not removable therefrom when cleaned.

As shown in open position in Figure 5., the upper mold sections II, I I", are in right-angular relation and the lower mold sections I2, I! are in right-angular relation. The upper and lower mold sections II, I2, are spaced apart to permit removal of the ornamented fabric 20. It is to be noted that upper and lower sprues 2| 22, are attached to the ornamental fabric when it is ,removed from the mold. This permits cutting off and removal of the .sprues from the ornamental figures after molding and so that in the completed product no plastic connections or sprues appear between the ornamental figures.

It is to be noted that the two upper mold sections I I, II" jointly comprise a two-member ornamental cavity I5. (Figure 5,.) The adjoining walls of the sections II, II have complementary gateways I6 for feeding material to the cavity 15.

Figure 6 is a fragmentary plan view of a section of fabric 20 when removed from the mold III. superposed plastic ornamental figures 2.5 are bonded to the fabric and may be of identical de sign and in exact superposed relation on the upper and lower surfaces of the fabric. .1 may. however, make the lower figure blank, or without ornamentation.

, The lower section l2 has dowel pins 21 suitably fixed therein. The upper section .II has openings 28 for the dowel pins, whereby the upper and lower complemental sections are movable in parallel spaced-apart relation to and from each other to grip and support a, section .of fabric intermediate the cavities I5, I5.

As best shown in Figure 4 the lower mold section 12 has an integral upright extension 30 at its rear face. The extension .30 has an integral bracket 3I with a horizontal face which is substantially in alinement with the upper face of Figure 6.

At the front end of the mold H] is an upright lever 34 which is pivotally secured on a pin 35 at the front end of the link 33. At the lower end of the lever 34 is a horizontal extension in g r ent r tth r article;

superposed plastic figures on any portion of a.

'In accordance with'--the patentstatutes 1 7 have'described and illustrated the preferred emwhich an eccentric 36 is rotatably mounted A" handle 38 is bent at one end to form a journal 39 for the eccentric. The eccentric'36 is suitably keyed (not shown) to the journal 39.

It will be seen by reference to Figure 4, that the link33 and-the lever 34 may be swungto- .wards the frontofnthefrnold and'when the. eccentric 35 is forced upwardly into contacting relation with the lower surface of the lowermold section 12,, the eccentric forcibly brings the up: per-and lower mold sections .in pressure contacting relation against the fabric and so thatthe mold is ready for a molding operation, .T When the operator swings the handle 38 into an upward direction toward the mold, he brings the eccentric downward and releases the grip .on the two mold sections and .on the fabric. The operator may .then swing the link Stand the lever 34 on the pin 32 in a direction to theleft of Qthe mold, when thelink comes into contacting relation with the upper surface of the bracket 3| and this brings the linkage entirely out of theway-of the. mold. The upper mold section may then. berai'sed away from the lower mold section as shown in Figures 2 and 5, when the. operator may themold I V Limit stops lzareprovided at opposite ends of the mold l8.

remove the molded fabric from the upper mold section IL, I v I The arms 43 have through slots .45 in which are pins 46 fixed in'the upper mold section II.

The stops comprise arms 43 suitably fixed to the lower. mold; sectionllZ .andi fitting in upright rectangular guideways 44 in fabric.

When the mold section II is raised above the lower mold section I2, the upper, wa1ls,of the slots-i5 limit this upward movement and maintain the unitary relation of the mold sections.

As shown in Figures 4 and 5 ,the mold It] may be secured to a table Q'Lby bolts 48 in a manner to permitilowering the section 12 to inoperative position.. I c f a I 'Itis to be noted that, when the pressureof the injection is made sufficiently high, the bonded plastic materialmay be made toicompletely fill the interstices in the fabricandso that the upper and lower plastic layers of materialaprwith each other.

" It is also to be noted that, the mold 0 may be'used'formolding with thermoplastic as well bodiment of my invention, but it will beunderstood .that various changes and modifications can be; made therein without departing from the w "ed claims; 1 l0 Iclaim:

i 1. 'In an injection apparatus for molding buttonhole elements in superposed relation on opposite sides of a sectionjof fabric with the sprues attached tosaid fabric. and jointly removable from said,;m0ld after molding, .a four-section mold, said mold comprising two pivotally mount- .ed complemental upper sections and two pivotally. -mounted complemental .lower sectiorisQsaid complemental sections having superposed cav itiesand separate injectionjgateslfor said cavities," one section'of' said complementary lower sections having dowelpinsifixed therein anfd'exe tending upwardlypand one seotion'o ilsai'dlcom plementary' upperfsections having fope'ningsjfor said dowel pins and bein'gslidable on said pins to and from said lower sections, wherebyisaid upper and lower complemental sections arem'ovabel toward each other to grip and support a section of fabric: intermediate said cavities, and means for injecting thermoplastic material through said gates into said" cavities simultaneously to cause said buttonholeelernents to ,be

bonded. to the pper. and lower. surfaces. or said 2. Aninjection apparatus for 'lding, plastic elements in Zsuperposed,1 relati n on topposite sides of a section of fabric ,withthe sprues fattached to said fabric andjoint'ly removable] from said mold after molding, comprisingla four sectionmold havin complemental ,iupp'er sections and complemental lower sections, said complemental sections having superposed cavities and p separate injection gates-for said cavities, one

" section of said complementary .ldwer sections '65 proacheach other and come into actual contact pins 50 extending from the lower mold section 1 l2" a distance equal to or slightly less ,than'the distance between the mold sections when in open position. Cavities iii in the upper mold section ll serve to receive the dowel pins 50. The dowel pins 'fill serve as a means for alining the sections l l' and 12', and may be taken asrepresenting any suitable means for performing the same function. V

It is tobe noted that if desired, buttonhole slits 52 may be made in the figures 25 shown in v However, there may be conditions when the slits maybe omitted so as to form having alining means therein and extendingupwardly, and one section of said complementary uppersections having. receiving.meansfor said alining means and being movable in parallel planes and inspaced-apart relation to andfrom sa d lower sections, whereby said upper. and

lower complemental sections aremoVabIet Ward each other to grip and supporta section print ric mtermediatesaid cavities, means for look.-

ing said upper and lower complementa'l, sections in pressure contacting relation against said .fab-

ric, and means .forinjecting.,plastic .m'aterial through said gates intosaid cavities-simultaneouslyto cause said elementstobebonded to the upper andfllowersurfacesof.saidfabric- V I c ;IS,RAnL} oTwINIoK.-

R FERENoEs oITEnA i The following references are of recordin the file ofthis, patent:. 1'5 V ii Ds i s iAr iiTEif Number Name V I 'E iDate-KI 1,033,841: Leblanc Jam-6,1914 2,415,961 Nast V Feb.y18, ;1947 a E BF QNImi-ENIS Number. 5 Country I Q Date France 

